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我正在使用Java創建一個簡單的Click Counter Android應用程序。我是Java新手。下面是我的代碼，gui有不同的功能按鈕，例如計數按鈕本身，重置計數按鈕和靜音按鈕。按鈕聲音和重置按鈕不起作用Android java
public class wazeefa extends Activity {
//Count Button
TextView txtCount;
ImageView image;
Button btnCount;
Button wmute;
Button wreset;
public static int count=0;
SharedPreferences app_preferences;
MediaPlayer mpButtonClick;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// The activity is being created.
setContentView(R.layout.wazeefa);
//SAVE COUNT
app_preferences = this.getSharedPreferences("myPrefscount", MODE_WORLD_READABLE);
count = app_preferences.getInt("count", 0);
txtCount = (TextView)findViewById(R.id.wcount);
txtCount.setText("This app has been started " + count + " times.");
txtCount = (TextView)findViewById(R.id.wcount);
txtCount.setText("This app has been started " + count + " times.");
//Button SOUND AND COUNT
mpButtonClick = MediaPlayer.create(this, R.raw.bubble);
//RESET Button
wreset = (Button)findViewById(R.id.wreset);
txtCount = (TextView)findViewById(R.id.wcount);
txtCount.setText(String.valueOf(count));
btnCount = (Button)findViewById(R.id.wclick);
btnCount.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
image = (ImageView) findViewById(R.id.imageview);
count++;
if (count > 50) count = 0; image.setImageResource(R.drawable.duroodimage);
if (count > 0) image.setImageResource(R.drawable.duroodimage);
if (count > 9) image.setImageResource(R.drawable.zikrimage);
if (count > 39) image.setImageResource(R.drawable.duroodimage);
txtCount.setText(String.valueOf(count));
}
});
wreset.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
count = 0;
image.setImageResource(R.drawable.duroodimage);;
txtCount.setText("0");
}
});
}
@Override
protected void onPause() {
super.onPause();
// save count value here
SharedPreferences.Editor editor = app_preferences.edit();
editor.putInt("count", count);
editor.commit();
}
//MUTE button
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.wmute:
AudioManager.setMode(AudioManager.MODE_IN_CALL);
AudioManager.setStreamSolo(AudioManager.STREAM_VOICE_CALL, true);
default:
AudioManager.setMode(AudioManager.MODE_NORMAL);
AudioManager.setStreamSolo(AudioManager.STREAM_VOICE_CALL, false);
break;
}
}
我有1個問題：
當我重新回到應用程序和計數顯示爲「5」只是舉例，Reset按鈕不再起作用 - 它什麼都不做，我得到一個錯誤AVD上的消息說'不幸'App'已經停止'。但是，當我繼續計數，然後點擊重置按鈕它的作品將計數再次變爲零
對上述問題的任何建議，我錯過了什麼或將代碼放在錯誤的地方？在編輯代碼之前，按鈕聲音正在工作，以保存「計數」數據。 讓我知道如果我含糊其辭......
崩潰日誌：
12-24 18:07:42.661: W/Trace(3633): Unexpected value from nativeGetEnabledTags: 0
12-24 18:07:42.741: D/AndroidRuntime(3633): Shutting down VM
12-24 18:07:42.741: W/dalvikvm(3633): threadid=1: thread exiting with uncaught exception (group=0x40a70930)
12-24 18:07:42.811: E/AndroidRuntime(3633): FATAL EXCEPTION: main
12-24 18:07:42.811: E/AndroidRuntime(3633): java.lang.NullPointerException
12-24 18:07:42.811: E/AndroidRuntime(3633): at com.shaadcorp.wazaifapp.wazeefa$2.onClick(wazeefa.java:81)
12-24 18:07:42.811: E/AndroidRuntime(3633): at android.view.View.performClick(View.java:4202)
12-24 18:07:42.811: E/AndroidRuntime(3633): at android.view.View$PerformClick.run(View.java:17340)
12-24 18:07:42.811: E/AndroidRuntime(3633): at android.os.Handler.handleCallback(Handler.java:725)
12-24 18:07:42.811: E/AndroidRuntime(3633): at android.os.Handler.dispatchMessage(Handler.java:92)
12-24 18:07:42.811: E/AndroidRuntime(3633): at android.os.Looper.loop(Looper.java:137)
12-24 18:07:42.811: E/AndroidRuntime(3633): at android.app.ActivityThread.main(ActivityThread.java:5039)
12-24 18:07:42.811: E/AndroidRuntime(3633): at java.lang.reflect.Method.invokeNative(Native Method)
12-24 18:07:42.811: E/AndroidRuntime(3633): at java.lang.reflect.Method.invoke(Method.java:511)
12-24 18:07:42.811: E/AndroidRuntime(3633): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-24 18:07:42.811: E/AndroidRuntime(3633): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-24 18:07:42.811: E/AndroidRuntime(3633): at dalvik.system.NativeStart.main(Native Method)
12-24 18:07:48.842: I/Process(3633): Sending signal. PID: 3633 SIG: 9
12-24 18:07:51.572: E/Trace(3808): error opening trace file: No such file or directory (2)
你能粘貼崩潰日誌嗎？ –
是的，確定添加日誌 – Mustafa